/* 全局基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', sans-serif;
}

:root {
    --primary: #8a2be2;
    --secondary: #4b0082;
    --accent: #ff4500;
    --dark: #1a1a2e;
    --darker: #0d0d1a;
    --light: #e6e6ff;
    --gray: #33334d;
}

body {
    background: linear-gradient(135deg, var(--darker), var(--dark));
    color: var(--light);
    min-height: 100vh;
    background-attachment: fixed;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(135deg, var(--accent), #ff6347);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(255, 69, 0, 0.4);
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(255, 69, 0, 0.6);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--primary), #9370db);
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.4);
}

.btn-secondary:hover {
    box-shadow: 0 8px 20px rgba(138, 43, 226, 0.6);
}

.btn-download {
    background: linear-gradient(135deg, #00c853, #009624);
    box-shadow: 0 5px 15px rgba(0, 200, 83, 0.4);
}

.btn-download:hover {
    box-shadow: 0 8px 20px rgba(0, 200, 83, 0.6);
}

/* 头部样式 */
header {
    background: rgba(10, 10, 20, 0.9);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--primary);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 50px;
    width: auto;
}

.logo h1 {
    font-size: 1.8rem;
    background: linear-gradient(to right, var(--accent), var(--primary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 800;
    text-shadow: 0 0 10px rgba(138, 43, 226, 0.5);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav a {
    color: var(--light);
    text-decoration: none;
    font-weight: 600;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
    position: relative;
}

nav a:hover {
    color: var(--accent);
    background: rgba(138, 43, 226, 0.1);
}

nav a.active {
    color: var(--accent);
}

nav a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 3px;
    background: var(--accent);
    border-radius: 3px;
}

/* 英雄区域 */
.hero {
    background: url('https://images.unsplash.com/photo-1542751371-adc38448a05e?q=80&w=2070') center/cover no-repeat;
    height: 500px;
    border-radius: 15px;
    margin: 20px 0;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 46, 0.8);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 20px;
    max-width: 800px;
}

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, #ff8c00, #ff4500);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 15px rgba(255, 69, 0, 0.5);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* 功能区 */
.features {
    display: flex;
    gap: 20px;
    margin: 30px 0;
}

.feature-card {
    background: rgba(30, 30, 50, 0.7);
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    flex: 1;
    transition: all 0.3s ease;
    border: 1px solid var(--gray);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(40, 40, 60, 0.8);
    border-color: var(--primary);
}

.feature-card i {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary);
}

/* 区块标题 */
.section-title {
    font-size: 2rem;
    text-align: center;
    margin: 40px 0 30px;
    position: relative;
    color: var(--accent);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
}

/* 页脚样式 */
footer {
    background: rgba(10, 10, 20, 0.9);
    padding: 40px 0 20px;
    margin-top: 50px;
    border-top: 2px solid var(--primary);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 30px;
}

.footer-column h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: #ccc;
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
}

.footer-column ul li a:hover {
    color: var(--accent);
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--accent);
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--gray);
    color: #aaa;
    font-size: 0.9rem;
}

/* 返回顶部按钮 */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 99;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--accent);
    transform: translateY(-5px);
}

/* 动画效果 */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(255, 69, 0, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(255, 69, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(255, 69, 0, 0); }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
.delay-4 { animation-delay: 0.8s; }

/* 响应式设计 */
@media (max-width: 992px) {
    .features {
        flex-wrap: wrap;
    }
    
    .feature-card {
        min-width: calc(50% - 20px);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero {
        height: 400px;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .feature-card {
        min-width: 100%;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
}